The old evils, the Instrumentalities from the Time Before Time, have begun to ooze back into the world and Piper Hecht's sister Heris and his living ancestor Cloven Februaren, the Ninth Unknown, have made Piper part of their fight against the return of the dark god Kharoulke the Windwalker.
- ISBN10 0765381672
- ISBN13 9780765381675
- Publish Date 1 November 2011 (first published 23 November 2010)
- Publish Status Active
- Imprint St. Martins Press-3PL
- Format Paperback (US Trade)
- Pages 658
- Language English